78 



more curved than the opposite ; cardinal teeth 

 small, lateral teeth more than one-third the 

 length of the long- fulcra. 



Syn. Solen ensiformis, 8. T. IVood, Ann. and 

 Mag. Nat. Hist. v. vi. 245. 



From Solen siliqua^ Linn., our shell diiFers in its propor- 

 tional width, which is much less, and in its greater degree 

 of convexity; also in the absence of an angle separating the 

 upper edge of the posterior area; from Solen Ensis, Linn., 

 Ensis magmis, Schum., in having only half the proportional 

 width. 



From the coralline Crag of Ramsholt, and the red Crag 

 of Walton Naze. 



ENSIS complanatus. 



TAB. BCXLU.— Jigs. % 3 and 4. 



Spec. Char. Slightly curved, strong, smooth, 

 compressed, anterior side shortest, angles 

 rounded. Anterior hinge-tooth large, lateral 

 teeth less than one-third the length of the long 

 fulcra. 



Syn. Solen siliqua, Morn's, 101. Wood, Ann. and 

 Mag. Nat.^ Hist. v. vi. 245. 



1 HE regular very slight convexity, less width, and the 

 want of an angle to separate the posterior area from the 

 hinge -slope, are marks by which this species is known 

 from the recent E7isis siliqua. 



Found at Sutton in the red, and at Bramerton in the 

 raammiferous Crag. The specimens figured were in the 

 late Mr. Parkinson's collection. 



